asus 1900p 68u netgear r7800

https://www.netgear.com/home/products/networking/cable-modems-routers/C7500.aspx Any insight on this modem/router combo? Couldn't find anything here via the search function. Reviews on BB seem pretty good. Are modem/router combo units still frowned upon in 2018 or is the Netgear C7500 a solid...

I currently have the Asus RT1900P (Best Buy version of the 68U) using stock Asus FW. I have 100MB down internet in a single floor unit. 2 iPads, 2 iPhones, 2 Apple TVs and 1 game console connected. Would it be worth it to upgrade to the Netgear R7800 or keep the Asus 1900P? Advice needed. Thanks